Drilling-machine.



S. E. HILLES & B. V. GOLBURN.

DRILLING momma APPLICATION FILED JAN. 23, 1912.

1 082,866, Patented Dec. 30, 1913.

2 SHEETS-SHBET-1.

coumhu Pumocmum couwasnmamn. if. c.

- s; E. HILLES & B. v. OOLBURN.

DRILLING MACHINE. 7 APPLICATION FiLED JAN. 23, 1912. 1,082,866, 1 Patented Dec. 30, 1913.

2 'SHEETSSHBET 2.

673M 1 Mam;

' COLUMBIA PLANOGRAPH COHWASHINCITDN, D q.

UNITED STATES PATEN T OFFICE.

SAMUEL E. HILLES AND BETHUEL VINCENT COLBURN, OF CINCINNATI, OHIO, ASSIGN- ORS TO THE SAMUEL .C. TATUM COMPANY,

OF OHIO.

OF CINCINNATI, 01-110, A CORPORATION DRILLING-MACI-IIN E.

Specification of Letters Patent.

Patented Dec. 30, 1913.

To all whom it may concern;-

Be it known that we, SAMUEL E. Humans and BETHUEL VINCENT COLBURN, both citi- Zens of the United States, residing at Oincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

Our invention relates to a drill press for perforating compiled sheets of paper.

It is the object of the invention to provide a simple and efiicient machine driven by power, with means for properly gaging the sheets on the table, clamping them securely for the drilling operation, then bringing the drill into operation, the table being laterally adjustable and interlocked at predetermined intervals, whereby an alined series of holes may be drilled and spaced as desired.

The features of the invention are more fully set forth in the description of the accompanying drawings, forming a part of this specification, in which Figure l is a side elevation of our improvement, with certain parts thereof illustrated in section. Fig. 2 is a partial front elevation. Fig. 3 is a bottom plan view, showing the arrangement of stops.

1 represents the base plate, shop bench or table, 2 a vertical column rising therefrom, having the forwardly extending arms 3, 4, in the ends of which the spindle 5 is rotatably journaled, and vertically movable.

6 represents the driving belt sheave, 7 an intermediate idler, and 8 the driven sheave having a splined engagement with the spindle 5, 9 being the transmission belt.

10 is a rack sleeve on the spindle and vertically slidable in collar 11.

12 is the operating pinion engaging the rack, manipulated by the handle 13 for feeding the spindle.

14 represents the hollow drill secured in the spindle, the upper end having a bore 15,

s so that the drillings can escape through the spindle outlet l6.

17 represents the table support consisting of a bracket arm having the cross bar 18 at its forward end.

19 represents a rod held by bracket arm 17 and laterally extended upon each side of the spindle to form a guide for the table adjustment.

orifice through which the 20 represents a table, having on its underside a sleeve bearing 21 engaging around rod 19. On the face of the table are the side paper gage 22 and the back paper gage 23. The bar 18 has the forwardly extending ears 24, between which is secured the rod 25. On rod 25 is secured a series of adjustable lugs or dogs 26 having the relatively long stops 27, and the relatively short beveled end detents 28, together forming an interlock for the table. On the front of the table is a handle 29, having a spring plunger 30, operated by the finger hook 31, the inner end of the plunger being adapted to snap over the detents 28 and interlock between one of the detents and one of the stops 27, when the table is moved laterally in the direction corresponding to the bevels of the detents. These dogs or lugs may be laterally adjusted on rod 25 for any desired spacing. Asshown in Fig. 3, on the left hand lug, the stop 27 is on the left hand side, while in the rest OftllG series extending to the right the stop 27 is on the right hand side. Thus, in its initial position, the table will be interlocked with the left hand lug, holding the table rigidly On its support, the spring plunger 30can be withdrawn and as the table is moved to the right it will be automatically interlocked with the next lug, and so on, so that the operator, having properly fixed the lugs need give no further at tention to the accurate positioning of the table.

In order to clamp the work during the drilling operation, a plate 32 is provided slidably engaging vertical slots formed in the lower end of the column 2. From this sleeve a U-shaped bracket arm 33 extends forward, its outer ends turning down and straddling the lower end of the spindle, a laterally extended clamping bar 34 is held by said downturned ends and having an drill projects.

35 represents a rod connected to collar 32, the upper end having the spring 36 connected with the frame, the lower end of said rod being connected with the foot treadle 37.

In operation, a pile of paper sheets has been placed on the table in proper relation to the gages, and the dogs 26 having been secured in their proper adjustment for the desired spacing of the perforations, the treadle 37 is depressed, bringing the clamping bar 34 forcibly down upon the top of the pile, to securely hold the paper in the line of drilling, and upon all sides of the drill point. The papers are first clamped down on the table, the spindle is then fed downwardly and the first hole drilled, the

spindle is withdrawn, the clamp raised and the table is moved to its next position of adjustment and so on.

The machine is very simple, cheap and eflicient and produces absolutely accurate work.

Having described our invention, we claim 2-- 1. In a machine of the nature described, a drill press organization, comprising a rotary vertically movable spindle, a table sup port formed with a laterally extended table guide, a laterally extended rod, a series of detent dogs adjustable on the rod, a table on the support engaging said guide, a handle on the table having a spring controlled plunger lock, adapted to engage and disengage the detents of the lugs and to lock the table to the support in a series of predetermined positions, a laterally extended and vertically movable clamping bar, adapted to bear upon the top of the pile to be drilled, and 11' eans for operating said clamping bar.

2. In a machine of the nature described, a frame, a rotatable and vertically movable spindle, a feed therefor, a table support, a table swingingly mounted and laterally guided thereon, a lock plunger and series 01. adjust-able lugs adapted to interlock the table and support, said lugs having stops and detents adapted to limit the lateral movement of the plunger in one direction, and to permit the plunger to automatically interlock with the lugs when moved in the same direction, and means for clamping the paper down on the table in the line of the drilling and upon all sides of the drill point.

3. A machine of the nature disclosed combining a work table supporting arm terminating in a lateral extension, a laterally extended rod on said arm in parallelism with said arm extension, a work supporting table hingedly and slidably mounted on said rod and engaging said arm extension, and stop elements on said arm extension, adapted to be engaged by said table to predeterminately position said table upon its supporting elements.

4. A machine of the nature disclosed combining a work table supportingarm terminating in a lateral extension, a laterally extended rod on said arm in parallelism with said arm extension, a work supporting table hingedly and slida-bly mounted on said rod and engaging said arm extension, stop elements on said arm extension, and releasable trip mechanism mounted on said table and movable therewith, adapted to engage said stop elements to predeterminately position said table upon its supporting elements.

In testimony whereof, we have hereunto set our hands.

SAMUEL E. HIL'LES. BETHUEL VINCENT COLBURN. Witnesses:

OLIVER B. KAISER, CLARENCE B. iFosrnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

